Can I Grow Rose Of Sharon in Minnesota?

Zone Comparison

Plant data: USDA PLANTS Database / Growable Ground plant catalog. State data: USDA ARS PHZM 2023, NOAA Climate Normals, NRCS SSURGO.

When to Plant Rose Of Sharon in Minnesota

Timing tuned to sub-state frost dates — Lake County, not the statewide average.

Frost window: NOAA Climate Normals 1991-2020. Plant timing fields: USDA PLANTS Database. Your site's own frost dates can run earlier or later than the state range — a parcel report pins them down.

Growing Season Fit

The zone check says rose of sharon survives winter in part of Minnesota, not across all of it. Whether the season is long enough — and warm enough — is a different question.

GDD and chill-hour figures are computed from PRISM 1991-2020 monthly climate normals; frost-free days from NOAA Regional Climate Centers ACIS, 1991-2020. Each is the state median across its counties (P25/P75 span the within-state spread). Hardiness-zone range is USDA PHZM 2023.

Soil + Drainage Fit

Rose Of Sharon tolerates a wide pH range (pH 5-8) — 3 units, acid ground through alkaline — so soil acidity is rarely what limits it in Minnesota. A soil test is still worth having, but for what else it tells you about this site, not to clear this plant. It will grow across that whole span, but it does best between pH 5.5 and 7.5 — worth knowing before you decide whether a Minnesota soil test result is a problem or just a number. Drainage matters: this plant wants well (dry spells). If your Minnesota site is heavier clay or sits in a low spot, raised beds or amendment with compost solve it.

Plant pH and drainage requirements from USDA PLANTS Database. Minnesota soil profile from USDA NRCS SSURGO. Site-specific verification: a 30-minute soil test from your local Extension lab.

What Else to Consider for Rose Of Sharon in Minnesota

Zone compatibility tells you about winter cold survival — but Minnesota growers also need to think about:

What to actually do about these — and the constraints that apply to every Minnesota grower, not just rose of sharon — is covered on the Minnesota growing guide.

Timing shifts within Minnesota

Minnesota isn't one climate. In Lake County, the last hard freeze (28°F) holds until about May 14 — roughly 23 days later than the recorded state median — so plant rose of sharon to your county's window, not the statewide date.

County last-freeze dates: NOAA Regional Climate Centers ACIS (1991-2020), county 28°F freeze (earlier than the folk 32°F "last frost"). A parcel report resolves your address's own frost dates.

Where in Minnesota Rose Of Sharon Is Zone-Hardy

Rose Of Sharon is rated for USDA zones 5–8. 18 of Minnesota’s 87 counties fall inside that band. The coldest that does is Blue Earth County at zone 5a. 69 counties sit below the plant’s zone 5 floor, where an unprotected plant is relying on snow cover and a mild year. Where you are in Minnesota decides this one.

Across those 87 counties Minnesota’s winter-low ladder runs from zone 3b in Beltrami County to zone 5a in Watonwan County — 1.5 USDA zones of spread, which is 15°F between the two counties’ average coldest night of the year. That is why a statewide hardiness answer is where you start and not where you finish.

The planting window moves with it. Lake County holds its last hard freeze (28°F) until about May 14, while Ramsey County is clear by Apr 10 — 34 days apart. Set rose of sharon out on your county’s date, not the state’s.

County hardiness zones: USDA Plant Hardiness Zone Map (PHZM) 2023, per county. County last-freeze dates: NOAA Regional Climate Centers ACIS (1991-2020), county 28°F killing freeze — earlier than the folk 32°F "last frost". Rose Of Sharon’s zone 5–8 band: USDA PLANTS / Growable Ground plant database. A parcel report resolves your address’s own zone and frost dates rather than its county’s.

Where in Minnesota Fits Best

Even within Minnesota's zones 3a-5a, county microclimates differ enough to change what thrives. These counties carry the closest zone match for rose of sharon (USDA PHZM 2023):

Pollinator + Wildlife Value

Rose Of Sharon draws honeybees, native bees, butterflies, and hummingbirds (moderate value, Growable Ground Plant Database). Planting it near vegetable beds can lift fruit set on neighboring crops. Outdoors, rose of sharon can only work that bloom inside Minnesota's frost window — roughly 174 days, opening after the last 28°F freeze (Apr 19 - Apr 30) and closing at the first (Oct 10 - Oct 17), per NOAA Regional Climate Centers ACIS, 1991-2020.

Minnesota Cooperative Extension

For Minnesota-specific cultivar recommendations, planting calendars, and pest pressure for rose of sharon, the canonical source is University of Minnesota Extension. Their fact sheets carry the local trial data we can't generalize across 50 states.

Is Rose Of Sharon native to Minnesota?

No — the USDA PLANTS Database lists Rose Of Sharon as introduced rather than native in the Lower 48, so it is not part of Minnesota's native flora. It grows here as a garden plant; pairing it with a few Minnesota natives keeps local pollinators fed too.

Looking for plants that belong here? The Minnesota growing guide lists USDA-documented natives for the state.

Native-range data: USDA PLANTS Database state-distribution records, accessed 2026-07-01.

What pests threaten rose of sharon in Minnesota?

Japanese beetle is documented in Minnesota and will find rose of sharon, but it is manageable here. What an experienced grower watches for, and does:

Japanese beetle

Worth watching

The University of Kentucky lists this among the landscape plants Japanese beetles are most likely to attack, and the skeletonized, lace-like leaves can look alarming. But the honest calibration is the University of Minnesota's: a healthy, established tree, shrub or vine tolerates a lot of this feeding without significant, long-term injury — in most cases the damage is cosmetic and will not kill the plant.

What to do: For an established planting the move is to leave it be and keep it watered through the four-to-six-week flight — a vigorous plant outgrows feeding that looks worse than it is. Young or already-stressed plants are the exception and worth hand-protecting: knock beetles into soapy water in the cool of morning, when they are slow. The one thing not to hang is a Japanese beetle trap — University of Kentucky research found the lures pull in far more beetles than they catch.

Documented range: states listed as Japanese-beetle infested · University of Kentucky Entomology, University of Minnesota Extension, National Plant Board

The full japanese beetle playbook

Only pests whose documented range and host relationship both trace to a primary source appear here — so a quiet section means we have nothing sourced to tell you, not that your garden is pest-free.

Common Questions About Growing Rose Of Sharon in Minnesota